US7619903B2 - Switching mode power supply and a method of operating the power supply in a power save mode - Google Patents

Switching mode power supply and a method of operating the power supply in a power save mode Download PDF

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Publication number
US7619903B2
US7619903B2 US11/397,552 US39755206A US7619903B2 US 7619903 B2 US7619903 B2 US 7619903B2 US 39755206 A US39755206 A US 39755206A US 7619903 B2 US7619903 B2 US 7619903B2
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voltage
save mode
power save
power supply
transformer
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US20070097715A1 (en
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Jong-Moon Choi
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Hewlett Packard Development Co LP
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Samsung Electronics Co Ltd
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Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHOI, JONG-MOON
Publication of US20070097715A1 publication Critical patent/US20070097715A1/en
Priority to US12/539,900 priority Critical patent/US7948777B2/en
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Priority to US13/084,776 priority patent/US8223510B2/en
Assigned to S-PRINTING SOLUTION CO., LTD. reassignment S-PRINTING SOLUTION CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAMSUNG ELECTRONICS CO., LTD
Assigned to HP PRINTING KOREA CO., LTD. reassignment HP PRINTING KOREA CO., LTD. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: S-PRINTING SOLUTION CO., LTD.
Assigned to HP PRINTING KOREA CO., LTD. reassignment HP PRINTING KOREA CO., LTD. CORRECTIVE ASSIGNMENT TO CORRECT THE DOCUMENTATION EVIDENCING THE CHANGE OF NAME PREVIOUSLY RECORDED ON REEL 047370 FRAME 0405. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Assignors: S-PRINTING SOLUTION CO., LTD.
Assigned to HP PRINTING KOREA CO., LTD. reassignment HP PRINTING KOREA CO., LTD. CHANGE OF LEGAL ENTITY EFFECTIVE AUG. 31, 2018 Assignors: HP PRINTING KOREA CO., LTD.
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. reassignment HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. CONFIRMATORY ASSIGNMENT EFFECTIVE NOVEMBER 1, 2018 Assignors: HP PRINTING KOREA CO., LTD.
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present general inventive concept relates to a switching mode power supply and a method of operating a power supply in a power save mode. More particularly, the present general inventive concept relates to a switching mode power supply that outputs at least two voltages and operates in a power save mode using a voltage difference when a minimum load is applied, and a method of operating in a power save mode.
  • SMPS switching mode power supply
  • DC direct current
  • the SMPS enters a power save mode to minimize power consumption when the high voltage power supply or the printer engine that uses a high voltage is idle.
  • the conventional SMPS has at least two pulse width modulation (PWM) controllers and at least two transformers to output at least two voltages.
  • PWM pulse width modulation
  • the conventional SMPS receives a PWM on/off signal to control the output of the high voltage to turn off the second PWM controller such that the high voltage is not output in the power save mode.
  • the SMPS includes two PWM controllers and two transformers.
  • a first PWM controller controls a low voltage output and a second PWM controller controls a high voltage output.
  • the first PWM controller outputs a PWM signal, and a first transistor switches on/off according to the PWM signal and thereby regulates a current flowing through a primary coil of a first transformer, and thus controls a voltage induced at a secondary coil of the first transformer.
  • the voltage induced at the secondary coil at the first transformer is rectified, smoothed, and then output to a first output terminal as the low voltage.
  • the second PWM controller and a second transistor generate a voltage in the same manner as described above and output the voltage to a second output terminal as the high voltage.
  • the conventional SMPS requires an external controller to output the PWM on/off signal to control the high voltage output from the second PWM controller to turn on/off (i.e. from on to off) when entering a power save mode.
  • the second PWM controller is shut down according to the received PWM on/off signal. That is, the second PWM controller stops outputting the high voltage when the PWM on/off signal is received.
  • the SMPS has to receive the control signal in order to operate in the power save mode. Accordingly, the SMPS also requires the external controller to output the control signal.
  • the present general inventive concept provides a switching mode power supply to operate in a power save mode using a voltage difference generated internally without requiring an external controller to output a control signal in order to operate in the power save mode, and a method of operating in the power save mode thereof.
  • a power supply which outputs a first voltage and a second voltage, including a first pulse width modulation (PWM) controller and a second PWM controller that are driven by different driving voltages to control the first and the second voltages to be output, respectively, a first transformer that is controlled by the first PWM controller to output the first voltage, the first transformer including a primary coil, a secondary coil, and an auxiliary winding, and a rectifier that rectifies and smoothes a current flowing through the auxiliary winding of the first transformer, generates a power save mode voltage based on the respective driving voltages of the first and the second PWM controllers, and supplies the power save mode voltage to the first and the second PWM controllers.
  • PWM pulse width modulation
  • the power save mode voltage generated by the rectifier may be greater than or equal to the driving voltage of the first PWM controller, and the power save mode voltage may be less than the driving voltage of the second PWM controller.
  • the second PWM controller may be powered off by the power save mode voltage.
  • an output terminal connected to a secondary coil of the first transformer may have a minimum load, and the rectifier may generate the power save mode voltage using a reduced current of the first transformer.
  • the power supply may further include a voltage lowering unit that lowers the power save mode voltage generated by the rectifier and supplies the lowered voltage to the second PWM controller.
  • the voltage lowering unit may include a first end connected to the rectifier and a second end connected to the second PWM controller.
  • the voltage lowering unit may either be a variable resistor or a regulator.
  • a power supply switch able between a power save mode and a normal driving mode
  • the power supply including a first output unit, a second output unit, a PWM controller unit to control the first output unit to output a first output voltage in the power save mode and in the normal driving mode, and to control the second output unit to output a second output voltage in the normal driving mode and not to output the second voltage when in the power save mode, and a sensing unit to sense a load applied to at least one of the first and second output units and to select one of the power save mode and the normal driving mode based on the sensed load.
  • a switching mode power supply usable with a high voltage power supply (HVPS) and/or a printer engine
  • the switching mode power supply including first and second output units, first and second transformers to provide first and second voltages to the first and second output units, respectively, a first PWM controller to drive the first transformer, a second PWM controller to drive the second transformer, and a sensing unit to drive the first and second PWM controllers using a driving voltage that is determined based on a load applied to at least one of the first and second output units.
  • a switching mode power supply including at least two output units to output different voltage levels including a high voltage, and a PWM switching unit to sense a load applied to the output units and to power OFF the output unit that outputs the high voltage when the load is determined to be a first load and to power ON the at least two output units when the load is determined to be a second load.
  • a power supply including at least two output units to output different voltage levels including a high voltage, at least two PWM controllers that are drivable by different voltages, and a sensing unit to sense a load applied to the output units and to power OFF the PWM controller that drives the output unit that outputs the high voltage when the load is determined to be in a first load state and to power ON the at least two PWM controllers when the load is determined to be in a second load state.
  • a method of operating a power supply in a power save mode including a first transformer to output a first voltage and having a primary coil, a secondary coil on which the first voltage is induced, and an auxiliary winding, and a second transformer to output a second voltage, and a first PWM controller and a second PWM controller that are driven by different driving voltages and control outputs of the first and the second transformers, respectively.
  • the method includes rectifying and smoothing a current flowing through the auxiliary winding of the first transformer, generating a power save mode voltage based on the respective driving voltages of the first and the second PWM controllers using the rectified and smoothed current of the auxiliary winding, and supplying the generated power save mode voltage to the first and the second PWM controllers.
  • the power save mode voltage may be greater than or equal to the driving voltage of the first PWM controller, and the power save mode voltage may be less than the driving voltage of the second PWM controller.
  • the method may further include lowering the power save mode voltage using either a variable resistor or a regulator and supplying the lowered power save mode voltage to the second PWM controller.
  • the foregoing and/or other aspects of the present general inventive concept are also achieved by providing a method of operating a power supply in a power save mode, the method including automatically selecting a power supply mode using a difference between driving voltages to drive at least two PWM controllers that control the power supply to output at least two voltages.
  • FIG. 1 is a circuit diagram illustrating a SMPS to operate in a power save mode according to an embodiment of the present general inventive concept
  • FIG. 2 is a circuit diagram illustrating a SMPS to operate in a power save mode according to another embodiment of the present general inventive concept.
  • FIG. 1 is a circuit diagram illustrating a SMPS to operate in a power save mode according to an embodiment of the present general inventive concept.
  • the SMPS powers on/off an output voltage using a voltage difference when a minimum load is applied, thereby operating in a power save mode.
  • the SMPS includes a first rectifier 110 , a first PWM controller 120 , a first transistor Q 1 , a first transformer 130 , a second rectifier 140 , a third rectifier 150 , a second PWM controller 160 , a second transistor Q 2 , a second transformer 170 , and a fourth rectifier 180 .
  • the first rectifier 110 rectifies an alternating current (AC) voltage input from an AC power supply using, for example, a bridge diode DM 1 and a capacitor C 1 .
  • AC alternating current
  • the AC voltage rectified by the first rectifier 110 is applied to primary coils of the first transformer 130 and the second transformer 170 .
  • the first transformer 130 induces a voltage on a secondary coil using interaction between the primary coil and the secondary coil.
  • the first PWM controller 120 outputs a first PWM signal to output a low voltage, and the first transistor Q 1 switches on/off according to the first PWM signal, thereby regulating a current flowing through the primary coil of the first transformer 130 . Accordingly, the voltage induced on the secondary coil of the first transformer 130 can be controlled according to the first PWM signal.
  • the first transistor Q 1 switches on/off according to the first PWM signal output from the first PWM controller 120 .
  • the second rectifier 140 rectifies and smoothes the voltage induced on the secondary coil of the first transformer 130 using, for example, a diode D 1 and a capacitor C 2 , and outputs the rectified and smoothed voltage to a first output terminal (output 1 ).
  • the voltage output to the first output terminal (output 1 ) is the low voltage.
  • the third rectifier 150 rectifies and smoothes a current flowing through an auxiliary winding of the first transformer 130 using, for example, a diode D 2 and a capacitor C 3 , thereby generating a Vcc.
  • the third rectifier 150 supplies the generated Vcc to the first and the second PWM controllers 120 and 160 as a driving voltage Vcc.
  • the first and the second PWM controllers 120 and 160 are driven by the Vcc supplied from the third rectifier 150 , and the first and second PWM controllers 120 and 160 generate the first PWM signal and a second PWM signal, respectively.
  • the second transformer 170 receives the voltage from the first rectifier 110 onto the primary coil thereof to induce a voltage on the secondary coil of the second transformer 170 using an interaction between the primary coil and the secondary coil.
  • the second PWM controller 160 outputs a second PWM signal to output a high voltage, and the second transistor Q 2 switches on/off according to the second PWM signal, thereby regulating a current flowing through the primary coil of the second transformer 170 . Accordingly, the voltage induced on the secondary coil of the second transformer 170 can be controlled according to the second PWM signal.
  • the second transistor Q 2 switches on/off according to the second PWM signal output from the second PWM controller 160 .
  • the fourth rectifier 180 rectifies and smoothes the voltage induced on the secondary coil of the second transformer 170 using, for example, a diode D 3 and a capacitor C 4 , and outputs the rectified and smoothed voltage to a second output terminal (output 2 ).
  • the voltage output to the second output terminal (output 2 ) is the high voltage.
  • the third rectifier 150 generates a normal driving voltage as the driving voltage Vcc to drive the first and the second PWM controllers 120 and 160 in a normal driving mode, and the third rectifier 150 generates a power save mode voltage as the driving voltage Vcc to enter the power save mode.
  • the first and the second PWM controllers 120 and 160 use different driving voltages.
  • the first PWM controller 120 uses a low level driving voltage, since the first PWM controller 120 outputs the first PWM signal to output the low voltage, whereas the second PWM controller 160 uses a high level driving voltage, since the second PWM controller 160 outputs the second PWM signal to output the high voltage.
  • both the first and the second PWM controllers 120 and 160 are driven (i.e., driven normally), and in the power save mode, the second PWM controller 160 that uses the high level driving voltage is powered off, and only the first PWM controller 120 is driven.
  • the first PWM controller 120 may use a driving voltage of 12V and the second PWM controller 160 may use a driving voltage of 15V. Other voltages may alternatively be used.
  • the third rectifier 150 may generate the Vcc of 15V at a minimum to normally drive the first and the second PWM controllers 120 and 160 .
  • the first and the second PWM controllers 120 and 160 are normally driven by the voltage 15V.
  • the first and the second output terminals (output 1 and output 2 ) have a minimum load applied thereto. Accordingly, a low level of current flows through the auxiliary winding of the first transformer 130 that is connected to the first output terminal (output 1 ) such that the third rectifier 150 generates the Vcc of 12V at a maximum, which is lower than the 15V in the normal driving mode. Accordingly, the second PWM controller 160 , which is to be driven by the voltage of 15V, is powered off and enters the power save mode.
  • the driving voltage Vcc generated by the third rectifier 150 is a power save mode voltage (e.g., 12V.) that corresponds to a voltage that is high enough to drive the first PWM controller 120 , but is not high enough to drive the second PWM controller 160 .
  • the current induced in the auxiliary winding of the first transformer 130 may result from interactions with the primary and/or secondary coil of the first transformer 130 .
  • the current flowing through the auxiliary winding of the first transformer 130 may be a function of the load applied to the first output terminal (output 1 ) on the secondary coil side of the first transformer 130 .
  • the current induced in the auxiliary winding of the first transformer 130 may be proportional to the load applied to the first output terminal (output 1 ).
  • the minimum load may be applied to the first output terminal (output 1 ) or the first and second output terminals (output 1 and output 2 ) when a high voltage power supply that uses the high voltage output by the second output terminal (output 2 ) or a printer engine that is connected to the first output terminal (output 1 ) is idle.
  • the auxiliary winding of the first transformer 130 and the third rectifier 150 can automatically switch the SMPS into the power save mode by sensing the load applied to first and second output terminals (output 1 and output 2 ) without requiring an external control signal produced by an external controller.
  • the auxiliary winding of the first transformer 130 may function as a sensing unit to sense the load that is applied to the output of the SMPS in order to generate the proper driving voltage Vcc for the first and second PWM controllers 120 and 160 .
  • FIG. 2 is a circuit diagram illustrating a SMPS to operate in a power save mode according to another embodiment of the present general inventive concept.
  • the SMPS includes a first rectifier 210 , a first PWM controller 220 , a first transistor Q 1 , a first transformer 230 , a voltage lowering unit 255 , a second rectifier 240 , a third rectifier 250 , a second PWM controller 260 , a second transistor Q 2 , a second transformer 270 , and a fourth rectifier 280 .
  • first rectifier 210 the first PWM controller 220 , the first transistor Q 1 , the first transformer 230 , the second rectifier 240 , the third rectifier 250 , the second PWM controller 260 , the second transistor Q 2 , the second transformer 270 , and the fourth rectifier 280 may be similar to those corresponding elements of the SMPS of the embodiment of FIG. 1 , detailed descriptions thereof will not be provided.
  • the voltage lowering unit 255 is disposed between the third rectifier 250 and the second PWM controller 260 and uses a voltage difference between a driving voltage applied as a Vcc to the second PWM controller 260 and a driving voltage applied as a Vcc to the first PWM controller 220 . More specifically, the voltage lowering unit 255 lowers the driving voltage applied from the third rectifier 250 to the second PWM controller 260 to create a greater difference between the driving voltages applied from the first PWM controller 220 and from the second PWM controller 260 .
  • the third rectifier 250 In the power save mode, the third rectifier 250 generates a lower level voltage as the driving voltage Vcc than in a normal driving mode similar to the third rectifier 150 of FIG. 1 .
  • the voltage lowering unit 255 further lowers the low level voltage output as the driving voltage Vcc supplied from the third rectifier 250 to the second PWM controller 260 . Accordingly, the second PWM controller 260 , being applied with the driving voltage Vcc lowered by the voltage lowering unit 255 , is powered off and enters the power save mode.
  • the auxiliary coil of the first transformer 230 may operate in a similar manner as described above with respect to the auxiliary winding of the first transformer 130 of FIG. 1 .
  • the voltage lowering unit 255 may be realized by an additional circuit such as a variable resistor or regulator to lower the driving voltage Vcc generated by the third rectifier 250 .
  • the SMPS outputs two voltages and can operate in a power save mode to generate one output voltage.
  • this arrangement should not be considered as limiting the scope of the present general inventive concept.
  • the method of operating in the power save mode may be applied to a SMPS that outputs more than two voltages.

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  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
US11/397,552 2005-10-28 2006-04-05 Switching mode power supply and a method of operating the power supply in a power save mode Active 2027-12-24 US7619903B2 (en)

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US12/539,900 US7948777B2 (en) 2005-10-28 2009-08-12 Switching mode power supply and a method of operating the power supply in a power save mode
US13/084,776 US8223510B2 (en) 2005-10-28 2011-04-12 Switching mode power supply and a method of operating the power supply in a power save mode

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KR1020050102073A KR100692567B1 (ko) 2005-10-28 2005-10-28 스위칭모드 전원공급장치 및 절전모드 구현방법
KR2005-102073 2005-10-28

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US12/539,900 Expired - Fee Related US7948777B2 (en) 2005-10-28 2009-08-12 Switching mode power supply and a method of operating the power supply in a power save mode
US13/084,776 Active US8223510B2 (en) 2005-10-28 2011-04-12 Switching mode power supply and a method of operating the power supply in a power save mode

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US13/084,776 Active US8223510B2 (en) 2005-10-28 2011-04-12 Switching mode power supply and a method of operating the power supply in a power save mode

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080238375A1 (en) * 2007-03-26 2008-10-02 On-Bright Electronics (Shanghai) Co., Ltd. Systems and methods for reducing emi in switch mode converter systems
US20090303754A1 (en) * 2005-10-28 2009-12-10 Samsung Electronics Co. Ltd. switching mode power supply and a method of operating the power supply in a power save mode
US20100109434A1 (en) * 2007-06-28 2010-05-06 Sanken Electric Co., Ltd. Multiple output switching power source apparatus
US20100201198A1 (en) * 2009-02-10 2010-08-12 Moxa Inc. Low- voltage dual power loop device and method
US20110298281A1 (en) * 2010-06-04 2011-12-08 Samsung Electronics Co., Ltd Switching mode power supply and power supply method using the same
US20120170329A1 (en) * 2008-05-29 2012-07-05 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode in a power converter
US8385088B2 (en) 2010-12-06 2013-02-26 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with output reset in a power converter
US8908395B2 (en) 2008-05-29 2014-12-09 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter

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* Cited by examiner, † Cited by third party
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JP5050874B2 (ja) * 2008-01-22 2012-10-17 富士電機株式会社 スイッチング電源装置
JP2011035112A (ja) * 2009-07-31 2011-02-17 Sanyo Electric Co Ltd 発光ダイオード駆動回路、照明機器
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CN104582115B (zh) * 2013-10-25 2017-10-13 绿色再生能科技股份有限公司 发光装置
KR102000582B1 (ko) * 2014-02-04 2019-07-16 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. 전원공급장치 및 이를 구비한 화상형성장치
KR102149952B1 (ko) * 2014-04-17 2020-08-31 엘지전자 주식회사 가전기기 및 동작 방법
CN106531420B (zh) * 2016-11-30 2018-09-07 李会朋 高稳定性变压器
US10749477B2 (en) * 2018-09-21 2020-08-18 Qualcomm Incorporated Series voltage regulation modulating power supply
CN110602829B (zh) * 2019-09-26 2021-11-16 中央民族大学 照明led驱动电路、装置及控制方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5291386A (en) * 1991-08-01 1994-03-01 Thomson Consumer Electronics, S.A. Switched mode power supply with precharge of base-emitter sweep-out capacitor
KR960043407A (ko) 1995-05-29 1996-12-23 배순훈 돌입전류차단용 저항 보호회로
US5852550A (en) * 1997-08-04 1998-12-22 Philips Electronics North America Corporation Switched-mode power supply circuit having a very low power stand-by mode
JP2000354371A (ja) 1999-06-01 2000-12-19 Semiconductor Components Industries Llc パルス幅変調制御装置
US6408148B1 (en) * 1999-05-17 2002-06-18 Canon Kabushiki Kaisha Image processing apparatus, image recording apparatus, controlling method for these apparatuses, and power supply apparatus used therein
JP2002218749A (ja) 2001-01-19 2002-08-02 Sony Corp スイッチング電源装置
JP2002315329A (ja) 2001-04-17 2002-10-25 Canon Inc 電気機器の省電力電源システム
KR20040025372A (ko) 2002-09-19 2004-03-24 삼성전자주식회사 회로 보호를 위한 스위칭 모드 전원 공급 장치의 구성 및그 방법
US7423893B2 (en) * 2002-10-11 2008-09-09 Thomson Licensing Power supply having two switch-mode power supply units

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937728A (en) * 1989-03-07 1990-06-26 Rca Licensing Corporation Switch-mode power supply with burst mode standby operation
KR0134952B1 (ko) * 1992-05-21 1998-04-23 정용문 병렬 스위칭모드 전원공급장치의 위상차 동기 제어회로
KR100229507B1 (ko) * 1997-02-21 1999-11-15 윤종용 이상전압 보호기능을 갖는 스위칭 모드 전원공급기
KR100219659B1 (ko) * 1997-08-27 1999-09-01 윤종용 인쇄기용 전원공급제어장치
KR19990069292A (ko) * 1998-02-06 1999-09-06 구자홍 역률개선용 전력 절감회로
KR20000007851A (ko) * 1998-07-07 2000-02-07 윤종용 양전원을 갖는 스위칭모드 전원공급장치
JP3607823B2 (ja) * 1998-11-19 2005-01-05 横河電機株式会社 スイッチング電源装置
KR20040031503A (ko) * 2002-10-07 2004-04-13 삼성전자주식회사 스너버 회로 및 이에 적합한 스위칭 모드 파워 서플라이
KR100692567B1 (ko) * 2005-10-28 2007-03-13 삼성전자주식회사 스위칭모드 전원공급장치 및 절전모드 구현방법

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5291386A (en) * 1991-08-01 1994-03-01 Thomson Consumer Electronics, S.A. Switched mode power supply with precharge of base-emitter sweep-out capacitor
KR960043407A (ko) 1995-05-29 1996-12-23 배순훈 돌입전류차단용 저항 보호회로
US5852550A (en) * 1997-08-04 1998-12-22 Philips Electronics North America Corporation Switched-mode power supply circuit having a very low power stand-by mode
US6408148B1 (en) * 1999-05-17 2002-06-18 Canon Kabushiki Kaisha Image processing apparatus, image recording apparatus, controlling method for these apparatuses, and power supply apparatus used therein
JP2000354371A (ja) 1999-06-01 2000-12-19 Semiconductor Components Industries Llc パルス幅変調制御装置
JP2002218749A (ja) 2001-01-19 2002-08-02 Sony Corp スイッチング電源装置
JP2002315329A (ja) 2001-04-17 2002-10-25 Canon Inc 電気機器の省電力電源システム
KR20040025372A (ko) 2002-09-19 2004-03-24 삼성전자주식회사 회로 보호를 위한 스위칭 모드 전원 공급 장치의 구성 및그 방법
US7423893B2 (en) * 2002-10-11 2008-09-09 Thomson Licensing Power supply having two switch-mode power supply units

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8223510B2 (en) * 2005-10-28 2012-07-17 Samsung Electronics Co., Ltd. Switching mode power supply and a method of operating the power supply in a power save mode
US7948777B2 (en) * 2005-10-28 2011-05-24 Samsung Electronics Co., Ltd. Switching mode power supply and a method of operating the power supply in a power save mode
US20110187192A1 (en) * 2005-10-28 2011-08-04 Samsung Electronics Co., Ltd. Switching mode power supply and a method of operating the power supply in a power save mode
US20090303754A1 (en) * 2005-10-28 2009-12-10 Samsung Electronics Co. Ltd. switching mode power supply and a method of operating the power supply in a power save mode
US8125802B2 (en) * 2007-03-26 2012-02-28 On-Bright Electronic (Shanghai) Co., Ltd. Systems and methods for reducing EMI in switch mode converter systems
US20080238375A1 (en) * 2007-03-26 2008-10-02 On-Bright Electronics (Shanghai) Co., Ltd. Systems and methods for reducing emi in switch mode converter systems
US8379415B2 (en) * 2007-03-26 2013-02-19 On-Bright Electronics (Shanghai) Co., Ltd. Systems and methods for reducing EMI in switch mode converter systems
US20100109434A1 (en) * 2007-06-28 2010-05-06 Sanken Electric Co., Ltd. Multiple output switching power source apparatus
US8063507B2 (en) * 2007-06-28 2011-11-22 Sanken Electric Co., Ltd. Multiple output switching power source apparatus
US9774268B2 (en) 2008-05-29 2017-09-26 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter
US9484822B2 (en) 2008-05-29 2016-11-01 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter
US8908395B2 (en) 2008-05-29 2014-12-09 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter
US20120170329A1 (en) * 2008-05-29 2012-07-05 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode in a power converter
US8519693B2 (en) * 2008-05-29 2013-08-27 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode in a power converter
US9154041B2 (en) 2008-05-29 2015-10-06 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode in a power converter
US10284100B2 (en) 2009-02-05 2019-05-07 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter
US10079544B2 (en) 2009-02-05 2018-09-18 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with an event counter in a power converter
US20100201198A1 (en) * 2009-02-10 2010-08-12 Moxa Inc. Low- voltage dual power loop device and method
US9093905B2 (en) * 2010-06-04 2015-07-28 Samsung Electronics Co., Ltd. Switching mode power supply and power supply method using the same
US9660549B2 (en) 2010-06-04 2017-05-23 S-Printing Solution Co., Ltd. Switching mode power supply
US20110298281A1 (en) * 2010-06-04 2011-12-08 Samsung Electronics Co., Ltd Switching mode power supply and power supply method using the same
US8599582B2 (en) 2010-12-06 2013-12-03 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with output reset in a power converter
US8385088B2 (en) 2010-12-06 2013-02-26 Power Integrations, Inc. Method and apparatus for implementing an unregulated dormant mode with output reset in a power converter

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US7948777B2 (en) 2011-05-24
US20110187192A1 (en) 2011-08-04
US20090303754A1 (en) 2009-12-10
US20070097715A1 (en) 2007-05-03
US8223510B2 (en) 2012-07-17
CN1956309B (zh) 2011-12-28
CN1956309A (zh) 2007-05-02

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